In its decision 4A_287/2020 of March 24, 2021, the Federal Supreme Court addresses the issue of the enforcement of a decision regarding account of agency, and provides three cauteries: the conclusions to be enforced must be precise, possible and covered by the decision itself. A company and a bank were bound by a set of banking contracts, in particular for the purchase and sale of options as well as by a lombard loan, which gave rise to contested margin calls. This dispute has already given rise to two published decisions of the Federal Court (ATF 139 III 49, commented in cdbf.ch/861/, on the scope of account of agency in complex contracts, and ATF 143 III 420 on the interpretation of the decisions of the Federal Court).